[The current state of the art of chemotherapy of penile cancer: results of a nationwide survey of German clinics]

Systemic treatment of penile squamous cell carcinoma-hurdles and hopes of preclinical models and clinical regimens: a narrative review

Despite contemporary research efforts, the prognosis of penile squamous cell carcinoma (PeSCC) has not significantly improved over the past decade. Despite frequently encountered patient-related delayed medical consultations impairing outcomes, several other aspects contribute to the lack of advancement in the treatment of this condition. One essential reason is that translational research, a prerequisite for the clinically successful disease management, is still at an early stage in PeSCC as compared to many other malignancies. Preclinical experimental models are indispensable for the evaluation of tumor biology and identification of genomic alterations. However, since neither commercial PeSCC cell lines are available nor xenograft models sustainably established, such analyses are challenging in this field of research. In addition, systemic therapies are less effective and toxic without decisive breakthroughs over recent years. Current systemic management of PeSCC is based on protocols that have been investigated in small series of only up to 30 patients. Thus, there is an unmet medical need for new approaches necessitating research efforts to develop more efficacious systemic strategies. This review aims to highlight the current state of knowledge in the molecular alterations involved in the etiology and ensuing steps for cancer progression, existing preclinical models of translational research, clinically relevant systemic protocols, and ongoing clinical trials.

[Quality of care criteria in the treatment of penile cancer]

BACKGROUND

Penile cancer is a rare malignancy and the wide range of quality of care associated with it often results in inferior oncologic and functional treatment outcomes.

OBJECTIVES

Assessment of the current healthcare situation in clinical routine and identification of the relevant key features and reference values for quality of care.

MATERIALS AND METHODS

Search for relevant peer-reviewed articles and published congress abstracts in Medline, Embase and other databases as well as Google web search engine.

RESULTS

Key quality features of penile cancer management include organ-sparing surgery of the primary tumor, invasive inguinal lymph node staging and systemic treatment. Adherence to treatment guidelines is currently low. Centralization of care has already led to a considerable improvement in the quality of care in some areas and increasing conformity with the guidelines' recommendations.

CONCLUSION

Centralization of care and networks based on this can significantly improve patient outcomes. Thus, reference values for core parameters of quality cancer care can be generated and validated. Moreover, organ-sparing surgery, invasive lymph node staging and systemic therapy should be increasingly utilized. As a reference value, 90% adherence to the guidelines for these three features is recommended. However, before centralization of care can be introduced, aspects relevant to practical implementation must be addressed, such as the reimbursement of travel costs for those affected, infrastructure costs and instruments to measure quality of life and patient satisfaction after centralization.

[Penile cancer : Diagnosis and treatment]

The incidence of penile cancer in central Europe and North America is low, and patients often present at a late stage of the disease. The diagnosis can very often be made by visual examination of the primary tumor. Its morphology, size, and location as well as the inguinal lymph nodes are of clinical interest. The removal of (micro)metastatic lymph nodes is decisive for the prognosis. These cannot be diagnosed clinically or by imaging with sufficient reliability, which makes invasive lymph node staging necessary. Penile cancer can only be cured by surgery in patients with localized cancer and early stage regional lymph node metastasis. The primary tumor, including metastatic lymph nodes, must be completely excised as early as possible. If indicated, organ preservation must be performed with strict adherence of safety margins. Optimal lymph node management is crucial for long-term survival.

Evaluation of Paclitaxel, Ifosfamide, and Cisplatin (TIP) Regimen on Penile Cancer in Adam Malik Medan: A Single Center 2 Years of Experience

BACKGROUND:

Penile tumour is a rare tumour in the genitourinary system, account for 0.4-0.6%. Although rare, patients are often unaware and come in late stage, so the use of chemotherapy agents is becoming crucial.

AIM:

This study was conducted to evaluate responses and overall survival rate of Paclitaxel, Ifosfamide, and Cisplatin (TIP) regimen in penile cancer with nodal involvement.

METHODS:

We included all medical records of penile squamous cell carcinoma patients associated with nodal involvement who acquired TIP regimen in Adam Malik Hospital between 2014 and 2016. We administered 175 mg/m2 of Paclitaxel on day 1, 1200 mg/m2 of Ifosfamide on days 1 to 3, and 25 mg/m2 of Cisplatin on days 1 to 3 as our standard TIP regimen. The regimen was re-administered every 21-28 days. Characteristics of the patient including age, history of circumcision, races, primary lesion of the tumour and TNM staging were noted. Adverse event, clinical responses, and overall survival were assessed and evaluated.

RESULTS:

We extracted data from 17 patients of penile cancer with nodal involvement who acquired TIP regimen with a mean age of 44.18 ± 11.13 years old from our medical records. Only 10 patients completed the full 4 cycles of the regimen. Four patients died before completion, two patients refused to continue the regimen, and 1 patient is still on the second cycle. Total penectomy was the most frequent procedure had taken, and clinical stage T4 and N3 was the most findings at initial diagnosis. There was no complete response noted. Six patients were noted as partial response, and 1 patient was noted as progressive disease. The Kaplan-Meier curve shows an overall 6 months (95% CI: 4.4-7.6 months) of survival with a median of follow-up time was 7 (1-11) months. In subgroup analysis, we found that the responder group has significantly better overall survival than the non-responder group (log-rank test, p = 0.004).

CONCLUSION:

Paclitaxel, Ifosfamide, and Cisplatin (TIP) regimen give significant clinical benefit in penile cancer with nodal involvement.

Rare cancers: Challenges & issues

Rare cancers account for about 22 per cent of all cancers diagnosed worldwide, disproportionately affecting some demographic groups, with an occurrence of less than 6 per 100,000 individuals annually. Many rare cancers in adults, adolescents and children are not curable, and patients and care providers have little option to take therapeutic decisions. The epidemiology of rare cancers is a challenging area of study but is inadequately addressed. Despite efforts mainly in some European nations, a few improvements have been observed in the management of rare cancers. Reasons for this obvious stagnation are multifactorial and are mainly inherent to logistical difficulties in carrying out clinical trials in very small patient populations, hesitation of the pharmaceutical industry to spend in small markets and complexity in creating adequate information for the development of cost-effective drugs. Rare cancers also face specific challenges that include late and incorrect diagnosis, lack of clinical expertise and lack of research interest and development of new therapies. The utilization of nationally representative study findings for the patients' evaluation may possibly offer chances to find out pathogenesis and prevalence, and this will eventually lead to control and prevention. Currently, advancing targeted therapies offer a great opportunity for the better management of rare cancers. Conducting clinical trials with small patient population, innovative clinical trial approach, prevailing controlling obstacles for international cooperation and financial support for research are the present challenges for rare cancers. The International Rare Cancers Initiative functions as a main platform for achieving new international clinical trials in rare tumours. This review delineates the current challenges and issues in the interpretation, management and research scenarios of rare cancers.

Emerging Systemic Therapies for the Management of Penile Cancer

Penile squamous cell carcinoma (PSCC) is a rare cancer, but is more common in developing countries. Locally advanced and metastatic PSCC is associated with significant morbidity and mortality, with the prognosis remaining extremely poor. The authors searched PubMed and published abstracts for metastatic PSCC studies to describe emerging therapies. Multimodality treatment using chemotherapy, radiation, and consolidative surgery are standard of care. Utilizing anti-EGFR therapies and novel immunotheraputic approaches may help improve outcomes in PSCC.

15 Years of penile cancer management in the United States: An analysis of the use of partial penectomy for localized disease and chemotherapy in the metastatic setting

BACKGROUND

Penile cancer remains a rare disease in the United States, and its understanding may be limited by the uncommon nature of the malignancy. We sought to describe recent penile cancer treatment patterns using the National Cancer Data Base.

METHODS

A retrospective review of data obtained from the National Cancer Data Base from 1998 to 2012 was performed. We obtained demographic information and therapeutic approaches within the following2 clinical scenarios: performance of partial penectomy for early stage disease (clinical Ta-T2) and the use of chemotherapy for metastatic disease. Multivariate logistic analysis was performed.

RESULTS

A total of 2,677 patients presented with early stage penile carcinoma. The proportion receiving partial penectomy increased from 74% in 1998 to 2000 to 80% in 2010 to 2012 (P<0.001). Partial penectomy was more common in the elderly (age>80, odd ratios [OR] = 1.53, 95% CI: 1.05-2.23), young (age<50, OR = 1.46, 95% CI: 1.02-2.07), and in African Americans (OR = 1.45, 95% CI: 1.00-2.12). Increasing tumor size was significantly associated with decreased likelihood of receiving partial penectomy. Of those presenting with metastatic disease (n = 819), use of chemotherapy increased over the time period from 39% receiving chemotherapy in 1998 to 2000 to 49% in 2010 to 2012 (P<0.03). Patients least likely to receive chemotherapy were older and with higher Comorbidity score (both P<0.05), African American (OR = 0.46, 95% CI: 0.30-0.73), and living≥50 miles from the nearest treatment hospital (OR = 0.37, 95% CI: 0.25-0.55).

CONCLUSIONS

Penile-sparing surgery for early stage disease and the use of chemotherapy for metastatic disease are becoming more commonly utilized over the past several years. Further work is needed to define clinical and nonclinical factors associated with the treatment.

Palliative chemotherapy in carcinoma penis: Does platinum and taxane combination holds a promise?

Aim:

To report safety and efficacy of chemotherapy incorporating the combination of paclitaxel and platinum in patients with advanced penile carcinoma.

Materials and Methods:

Retrospective analysis of patient with advanced penile carcinoma undergoing palliative chemotherapy with paclitaxel and platinum combination. The demographic profile, indication of treatment, chemotherapy details, toxicity and survival outcome were noted. Statistical analysis was done for estimation of progression free survival and overall survival. Factors affecting these outcomes were sought for.

Results:

Eighteen patients with a median age of 47.5 years (31-68 years) were offered palliative intent chemotherapy over a period of 2.5 years. ECOG performance was 1 in 12 patients (66.7%) and 2 in 6 patients (33.3%). The grade of tumor was poorly differentiated in 8 patients (44.4%), moderately differentiated in 5 (27.8%) and we1l differentiated in 5 patients (27.8%). Twelve patients had previous surgical treatment (66.7%), with 2 of them having received groin radiation in past. The indication for treatment was metastatic disease in 7 patients (38.9%) and locally advanced disease in 11 patients (61.1%). Out of 18 patients 13 received chemotherapy. Paclitaxel and carboplatin combination was given in 10 patients (76.9%) while paclitaxel and cisplatin was received by 3 patients (23.1%). The median numbers of cycles received were 3 (1-6 cycles). Response rate was 30.8%. The median estimated progression free survival (PFS) and overall survival (OS) for patients receiving atleast one cycle of chemotherapy (n = 13) were 96 days and 246 days respectively. Among tested variables the median OS in patients who had received 2 or more cycles was 351 days versus 55 days in those who received less than 2 cycles (P = 0.025). However, after applying Bonferroni correction, the difference was no longer significant. There was no toxicity related death or life threatening complication.

Conclusion:

Our institutional protocol of platinum-based doublet with paclitaxel is effective, well-tolerated and has the advantage being delivered on an outpatient basis alone. Overall, we believe that paclitaxel-platinum is an effective regimen that needs to be investigated further in larger studies.

[National second-opinion network for testicular cancer patients. Results of a user survey]

BACKGROUND

The national second opinion project of the German Testicular Cancer Study Group (GTCSG) has served to improve the quality of care provided to testicular cancer patients since 2006.

AIM

A recent online survey was carried out to characterize the users of the second opinion offer and clarify their motivation for participating in the project. Furthermore, the aim was to identify weaknesses of the project which could be improved. A total of 440 users of the second opinion project were contacted of whom 192 participated in the survey.

RESULTS

In summary, the data collected showed a high degree of satisfaction among the participants who appreciated the second opinions received. Some issues with a need for improvement, predominantly in the structural organisational area, were disclosed. These served as a basis for a recently completed revision of the project immanent internet-based communication platform with a new data mask facilitating the introduction of patients with relapsed tumors. Interestingly, a high proportion of survey participants expressed the desire for establishment of a similar second opinion project for patients with penile cancer (77.1% of the participants).

Penile cancer: current therapy and future directions

Background Penile cancer (PC) is a rare cancer in western countries, but is more common in parts of the developing world. Due to its rarity and the consequent lack of randomized trials, current therapy is based on retrospective studies and small prospective trials. Design Studies of PC therapy were searched in PubMed and abstracts at major conferences. Results PC is generally an aggressive malignancy characterized by early locoregional lymph node (LN) spread and later metastases in distant sites. Given the strong predictive value of LN involvement for overall survival, evaluating regional LNs is critical. Advanced LN involvement is increasingly being treated with multimodality therapy incorporating chemotherapy and/or radiation. A single superior cisplatin-based regimen has not been defined. Further advances may occur with a better collaboration on an international scale and comprehensive understanding of tumor biology. To this end, the preventive role of circumcision and understanding of the oncogenic roles of Human Papilloma Virus-16, and smoking may yield advances. Preliminary data suggest a role for agents targeting epidermal growth factor receptor and angiogenesis. Conclusion Advances in therapy for PC will require efficient trial designs, synergistic collaboration, incentives to industry and the efforts of patient advocacy groups and venture philanthropists.

Role of paclitaxel and platinum-based adjuvant chemotherapy in high-risk penile cancer

Aim:

To study the efficacy and safety of paclitaxel and platinum doublet chemotherapy in penile cancer patients with high-risk features of local failure.

Materials and Methods:

Retrospective analysis was done of patients with 19 carcinoma of the penis who were offered adjuvant chemotherapy with paclitaxel and platinum combination. The data regarding the surgical details, high-risk features for which chemotherapy was offered, chemotherapy toxicity details (in accordance with CTCAE vs 3), failure pattern, and survival data were noted. SPSS version 16 was used for statistical analysis. Descriptive and Kaplan–Meier survival analysis was performed.

Results:

Median age of patients was 48 years. Fifteen patients received paclitaxel in combination with cisplatin and four received paclitaxel with carboplatin in view of their low serum creatinine clearance. The treatment was completed by 12 patients (63.2%). Of 79 planned cycles, 50 were taken. The treatment was well tolerated with grade 3-4 gastrointestinal toxicity was seen in 1 patient, grade 3 neurological toxicity in one and grade 5 neutropenia in one patient. Treatment related death occured in one patient. The median follow-up was 15.33 months and 6 loco-regional relapsed had taken place. The estimated median DFS was 16.2 months and the estimated median OS was not reached. The estimated DFS for treatment completed patients was 23.13 months as against 2.16 months for patients not completing treatment.

Conclusion:

The platinum and taxane doublet chemotherapy was found to be safe and effective.

Chemotherapy in penile cancer

Penile cancer is an aggressive disease and after systemic progression it is virtually incurable. While this squamous cell cancer responds to chemotherapy, successful treatment of lymphatic metastases can only be achieved with aggressive surgical treatment in combination with chemotherapy. However, because penile carcinoma is relatively rare there is a paucity of clinical data on the chemotherapy for this aggressive disease. Recent advances have included the establishment of less toxic regimens incorporating taxanes, while cisplatinum remains central to all regimens. Multi-institutional studies are urgently needed to advance the multimodal care for patients with penile cancer.